Oswald Freisler joined the Nazi Party in 1927 and was a member of the National Socialist Association of Legal Professionals.
In 1936, he took over the Berlin office of Jewish lawyer Johannes Werthauer, who left Germany in 1933 in order to teach at the Sorbonne.
In 1937, on behalf of the Catholic Church, Freisler took over the defence of three co-defendants in the trial of Joseph C. Rossaint, a resistance fighter against National Socialism, and won an acquittal, much to the displeasure of the Nazi Party.
In response, Joseph Goebbels asked Adolf Hitler to personally exclude Freisler from the party.
One is that he defenestrated himself from his office, another is that the incident occurred in prison, and the third version is that he injected himself with an overdose of insulin.